those blazing wildfires threatening homes in California. Firefighters, facing tough conditions again today. ABC's Cecilia Vega is in San Diego with the latest. Good morning, Cecilia. Reporter: Robin, good morning to you all. These fire trucks right here behind me, ready to be called into action at a moment's notice. The strong winds and record-breaking temperatures out here in California, a firefighter's worst enemy. Overnight, firefighters on high alert, trying to keep a burning fire at bay. What started as a small brush fire, roaring into a wildfire, torching more than 800 acres. I was in my living room. I could see the smoke coming over the ridge. I saw some families leaving. One person was running. Reporter: Crews struggled to get a grip any way they could. By air tanker. Helicopter. And on the ground. Some residents even staying behind to take on the fire themselves. Fighting it off with garden hoses. The flames, coming within mere feet of homes and luxury estates. So far, no damage. 5,000 residents told to evacuate, all allowed back home. To the north, another fire raging near Santa Barbara. This one, burning 700 acres. Firefighters evacuating 1,200 homes. With extremely dry conditions, triple-digit temperatures and heavy winds, residents around California are bracing for danger. More than 17 million people in red flag warnings today. The conditions we're seeing right now is normally what we would see in September and October. We're seeing them in may. We're prepared for the worst. And we have to expect it. That's what we have to look for. We will have a large wildfire. Reporter: Will. Not if, but when. Prepared for the worst. The firefighters are bracing for another day for strong winds. With that has potential for flare-ups. But out here, they're telling us the worst appears to be over. We're going to turn to the breaking news on the mine

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